The watch has a 3-day power reserve and combines the latest in hairspring technology with an escapement developed through the MEMS technology to achieve high accuracy and stability when worn. The delicacy, strength and beauty of the movement can be enjoyed the exhibition case ba Exterior: Stainless steel Case back: See-through case back Case back with 6 screws Glass Material: Box shaped sapphire crystal Glass Coating: Anti-reflective coating on inner surface Case size: Diameter 37.3mm Lug-to-lug 44.3mm Thickness 11.6mm Band width: 19mm Band Material: Crocodile leather Movement Caliber no.: 9S64 Instructions Movement Type: Manual winding Power reserve: Approx. 72 hours(3 days) Mean daily rate: +5 to -3 seconds per day Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days. Normal usage accuracy: +10 to -1 seconds per day